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#ifndef lint
static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/tif_vms.c,v 1.9 93/08/25 09:35:01 sam Exp $";
#endif
/*
* Copyright (c) 1988, 1989, 1990, 1991, 1992 Sam Leffler
* Copyright (c) 1991, 1992 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the names of
* Sam Leffler and Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Sam Leffler and Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/*
* TIFF Library VMS-specific Routines.
*/
#include "tiffiop.h"
static tsize_t
_tiffReadProc(thandle_t fd, tdata_t buf, tsize_t size)
{
return (read((int) fd, buf, size));
}
static tsize_t
_tiffWriteProc(thandle_t fd, tdata_t buf, u_long size)
{
return (write((int) fd, buf, size));
}
static toff_t
_tiffSeekProc(thandle_t fd, toff_t off, int whence)
{
return ((toff_t) lseek((int) fd, (off_t) off, whence));
}
static int
_tiffCloseProc(thandle_t fd)
{
return (close((int) fd));
}
#include <sys/stat.h>
static toff_t
_tiffSizeProc(thandle_t fd)
{
struct stat sb;
return (toff_t) (fstat((int) fd, &sb) < 0 ? 0 : sb.st_size);
}
#ifdef MMAP_SUPPORT
#include <fab.h>
#include <secdef.h>
/*
* Table for storing information on current open sections.
* (Should really be a linked list)
*/
#define MAX_MAPPED 100
static int no_mapped = 0;
static struct {
char *base;
char *top;
unsigned short channel;
} map_table[MAX_MAPPED];
/*
* This routine maps a file into a private section. Note that this
* method of accessing a file is by far the fastest under VMS.
* The routine may fail (i.e. return 0) for several reasons, for
* example:
* - There is no more room for storing the info on sections.
* - The process is out of open file quota, channels, ...
* - fd does not describe an opened file.
* - The file is already opened for write access by this process
* or another process
* - There is no free "hole" in virtual memory that fits the
* size of the file
*/
static int
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
char name[256];
struct FAB fab;
unsigned short channel;
char *inadr[2], *retadr[2];
unsigned long status;
long size;
if (no_mapped >= MAX_MAPPED)
return(0);
/*
* We cannot use a file descriptor, we
* must open the file once more.
*/
if (getname(fd, name, 1) == NULL)
return(0);
/* prepare the FAB for a user file open */
fab = cc$rms_fab;
fab.fab$v_ufo = 1;
fab.fab$b_fac = FAB$M_GET;
fab.fab$b_shr = FAB$M_SHRGET;
fab.fab$l_fna = name;
fab.fab$b_fns = strlen(name);
status = sys$open(&fab); /* open file & get channel number */
if ((status&1) == 0)
return(0);
channel = (unsigned short)fab.fab$l_stv;
inadr[0] = inadr[1] = (char *)0; /* just an address in P0 space */
/*
* Map the blocks of the file up to
* the EOF block into virtual memory.
*/
size = _tiffSizeProc(fd);
status = sys$crmpsc(inadr, retadr, 0, SEC$M_EXPREG, 0,0,0, channel,
howmany(size,512), 0,0,0);
if ((status&1) == 0){
sys$dassgn(channel);
return(0);
}
*pbase = (tdata_t) retadr[0]; /* starting virtual address */
/*
* Use the size of the file up to the
* EOF mark for UNIX compatibility.
*/
*psize = (toff_t) size;
/* Record the section in the table */
map_table[no_mapped].base = retadr[0];
map_table[no_mapped].top = retadr[1];
map_table[no_mapped].channel = channel;
no_mapped++;
return(1);
}
/*
* This routine unmaps a section from the virtual address space of
* the process, but only if the base was the one returned from a
* call to TIFFMapFileContents.
*/
static void
_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
char *inadr[2];
int i, j;
/* Find the section in the table */
for (i = 0;i < no_mapped; i++) {
if (map_table[i].base == (char *) base) {
/* Unmap the section */
inadr[0] = (char *) base;
inadr[1] = map_table[i].top;
sys$deltva(inadr, 0, 0);
sys$dassgn(map_table[i].channel);
/* Remove this section from the list */
for (j = i+1; j < no_mapped; j++)
map_table[j-1] = map_table[j];
no_mapped--;
return;
}
}
}
#else /* !MMAP_SUPPORT */
static int
_tiffMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize)
{
return (0);
}
static void
_tiffUnmapProc(thandle_t fd, tdata_t base, toff_t size)
{
}
#endif /* !MMAP_SUPPORT */
/*
* Open a TIFF file descriptor for read/writing.
*/
TIFF*
TIFFFdOpen(int fd, const char* name, const char* mode)
{
TIFF* tif;
tif = TIFFClientOpen(name, mode,
(thandle_t) fd,
_tiffReadProc, _tiffWriteProc, _tiffSeekProc, _tiffCloseProc,
_tiffSizeProc, _tiffMapProc, _tiffUnmapProc);
if (tif)
tif->tif_fd = fd;
return (tif);
}
/*
* Open a TIFF file for read/writing.
*/
TIFF*
TIFFOpen(const char* name, const char* mode)
{
static const char module[] = "TIFFOpen";
int m, fd;
m = _TIFFgetMode(mode, module);
if (m == -1)
return ((TIFF*)0);
if (m&O_TRUNC){
/*
* There is a bug in open in VAXC. If you use
* open w/ m=O_RDWR|O_CREAT|O_TRUNC the
* wrong thing happens. On the other hand
* creat does the right thing.
*/
fd = creat(name, 0666,
"alq = 128", "deq = 64", "mbc = 32",
"fop = tef", "ctx = stm");
} else if (m&O_RDWR) {
fd = open(name, m, 0666,
"deq = 64", "mbc = 32", "fop = tef", "ctx = stm");
} else
fd = open(name, m, 0666, "mbc = 32");
if (fd < 0) {
TIFFError(module, "%s: Cannot open", name);
return ((TIFF*)0);
}
return (TIFFFdOpen(fd, name, mode));
}
void*
_TIFFmalloc(size_t s)
{
return (malloc(s));
}
void
_TIFFfree(void* p)
{
free(p);
}
void*
_TIFFrealloc(void* p, size_t s)
{
return (realloc(p, s));
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.